vf_deshake_opencl.c File Reference

#include <float.h>
#include <libavutil/lfg.h>
#include "libavutil/opt.h"
#include "libavutil/mem.h"
#include "libavutil/fifo.h"
#include "libavutil/common.h"
#include "libavutil/avassert.h"
#include "libavutil/pixdesc.h"
#include "libavutil/pixfmt.h"
#include "avfilter.h"
#include "framequeue.h"
#include "filters.h"
#include "transform.h"
#include "internal.h"
#include "opencl.h"
#include "opencl_source.h"
#include "video.h"

Go to the source code of this file.

Data Structures
struct	PointPair
struct	MotionVector
struct	DebugMatches
struct	AbsoluteFrameMotion
struct	FrameDelta
struct	SimilarityMatrix
struct	CropInfo
struct	IterIndices
struct	DeshakeOpenCLContext

Macros
#define	BREIFN   512
#define	BRIEF_PATCH_SIZE   31
#define	BRIEF_PATCH_SIZE_HALF   (BRIEF_PATCH_SIZE / 2)
#define	MATCHES_CONTIG_SIZE   2000
#define	ROUNDED_UP_DIV(a, b)   ((a + (b - 1)) / b)
#define	OFFSET(x)   offsetof(DeshakeOpenCLContext, x)
#define	FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM

Enumerations
enum	RingbufferIndices {   RingbufX, RingbufY, RingbufRot, RingbufScaleX,   RingbufScaleY, RingbufCount }

Functions
static void	free_debug_matches (AbsoluteFrameMotion *afm)
static int	rand_in (int low, int high, AVLFG *alfg)
static double	averaged_event_time_ms (unsigned long long total_time, int num_frames)
static void	run_estimate_kernel (const MotionVector *point_pairs, double *model)
static int	points_not_collinear (const cl_float2 **points)
static int	check_subset (const MotionVector *pairs_subset)
static int	get_subset (AVLFG *alfg, const MotionVector *point_pairs, const int num_point_pairs, MotionVector *pairs_subset, int max_attempts)
static void	compute_error (const MotionVector *point_pairs, const int num_point_pairs, const double *model, float *err)
static int	find_inliers (MotionVector *point_pairs, const int num_point_pairs, const double *model, float *err, double thresh)
static int	ransac_update_num_iters (double confidence, double num_outliers, int max_iters)
static int	estimate_affine_2d (DeshakeOpenCLContext *deshake_ctx, MotionVector *point_pairs, DebugMatches *debug_matches, const int num_point_pairs, double *model_out, const double threshold, const int max_iters, const double confidence)
static void	optimize_model (DeshakeOpenCLContext *deshake_ctx, MotionVector *best_pairs, MotionVector *inliers, const int num_inliers, float best_err, double *model_out)
static int	minimize_error (DeshakeOpenCLContext *deshake_ctx, MotionVector *inliers, DebugMatches *debug_matches, const int num_inliers, double *model_out, const int max_iters)
static FrameDelta	decompose_transform (double *model)
static int	make_vectors_contig (DeshakeOpenCLContext *deshake_ctx, int size_y, int size_x)
static float	gaussian_for (int x, float sigma)
static void	make_gauss_kernel (float *gauss_kernel, float length, float sigma)
static IterIndices	start_end_for (DeshakeOpenCLContext *deshake_ctx, int length)
static void	ringbuf_float_at (DeshakeOpenCLContext *deshake_ctx, AVFifo *values, float *val, int offset)
static float	smooth (DeshakeOpenCLContext *deshake_ctx, float *gauss_kernel, int length, float max_val, AVFifo *values)
static cl_float2	transformed_point (float x, float y, float *transform)
static void	transform_center_scale (float x_shift, float y_shift, float angle, float scale_x, float scale_y, float center_w, float center_h, float *matrix)
static void	update_needed_crop (CropInfo *crop, float *transform, float frame_width, float frame_height)
static av_cold void	deshake_opencl_uninit (AVFilterContext *avctx)
static int	deshake_opencl_init (AVFilterContext *avctx)
static void	transform_debug (AVFilterContext *avctx, float *new_vals, float *old_vals, int curr_frame)
static int	filter_frame (AVFilterLink *link, AVFrame *input_frame)
static int	queue_frame (AVFilterLink *link, AVFrame *input_frame)
static int	activate (AVFilterContext *ctx)
	AVFILTER_DEFINE_CLASS (deshake_opencl)

Variables
static const AVFilterPad	deshake_opencl_inputs []
static const AVFilterPad	deshake_opencl_outputs []
static const AVOption	deshake_opencl_options []
const AVFilter	ff_vf_deshake_opencl

Macro Definition Documentation

BREIFN

#define BREIFN   512

Definition at line 86 of file vf_deshake_opencl.c.

BRIEF_PATCH_SIZE

#define BRIEF_PATCH_SIZE   31

Definition at line 89 of file vf_deshake_opencl.c.

BRIEF_PATCH_SIZE_HALF

#define BRIEF_PATCH_SIZE_HALF   (BRIEF_PATCH_SIZE / 2)

Definition at line 90 of file vf_deshake_opencl.c.

MATCHES_CONTIG_SIZE

#define MATCHES_CONTIG_SIZE   2000

Definition at line 92 of file vf_deshake_opencl.c.

ROUNDED_UP_DIV

#define ROUNDED_UP_DIV	(		a,
			b
	)		((a + (b - 1)) / b)

Definition at line 94 of file vf_deshake_opencl.c.

OFFSET

#define OFFSET

(

x

)

offsetof(DeshakeOpenCLContext, x)

Definition at line 2126 of file vf_deshake_opencl.c.

FLAGS

#define FLAGS   AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM

Definition at line 2127 of file vf_deshake_opencl.c.

Enumeration Type Documentation

RingbufferIndices

enum RingbufferIndices

Enumerator
RingbufX
RingbufY
RingbufRot
RingbufScaleX
RingbufScaleY
RingbufCount

Definition at line 110 of file vf_deshake_opencl.c.

Function Documentation

free_debug_matches()

static void free_debug_matches ( AbsoluteFrameMotion *  afm )

static

Definition at line 151 of file vf_deshake_opencl.c.

Referenced by deshake_opencl_uninit().

rand_in()

static int rand_in ( int  low, int  high, AVLFG *  alfg  )

static

Definition at line 304 of file vf_deshake_opencl.c.

Referenced by deshake_opencl_init(), and get_subset().

averaged_event_time_ms()

static double averaged_event_time_ms ( unsigned long long  total_time, int  num_frames  )

static

Definition at line 310 of file vf_deshake_opencl.c.

Referenced by activate().

run_estimate_kernel()

static void run_estimate_kernel ( const MotionVector *  point_pairs, double *  model  )

static

Definition at line 320 of file vf_deshake_opencl.c.

Referenced by estimate_affine_2d(), minimize_error(), and optimize_model().

points_not_collinear()

static int points_not_collinear ( const cl_float2 **  points )

static

Definition at line 350 of file vf_deshake_opencl.c.

Referenced by check_subset().

check_subset()

static int check_subset ( const MotionVector *  pairs_subset )

static

Definition at line 376 of file vf_deshake_opencl.c.

Referenced by get_subset().

get_subset()

static int get_subset ( AVLFG *  alfg, const MotionVector *  point_pairs, const int  num_point_pairs, MotionVector *  pairs_subset, int  max_attempts  )

static

Definition at line 394 of file vf_deshake_opencl.c.

Referenced by estimate_affine_2d(), and minimize_error().

compute_error()

static void compute_error ( const MotionVector *  point_pairs, const int  num_point_pairs, const double *  model, float *  err  )

static

Definition at line 436 of file vf_deshake_opencl.c.

Referenced by find_inliers(), minimize_error(), and optimize_model().

find_inliers()

static int find_inliers ( MotionVector *  point_pairs, const int  num_point_pairs, const double *  model, float *  err, double  thresh  )

static

Definition at line 460 of file vf_deshake_opencl.c.

Referenced by estimate_affine_2d().

ransac_update_num_iters()

static int ransac_update_num_iters ( double  confidence, double  num_outliers, int  max_iters  )

static

Definition at line 496 of file vf_deshake_opencl.c.

Referenced by estimate_affine_2d().

estimate_affine_2d()

static int estimate_affine_2d ( DeshakeOpenCLContext *  deshake_ctx, MotionVector *  point_pairs, DebugMatches *  debug_matches, const int  num_point_pairs, double *  model_out, const double  threshold, const int  max_iters, const double  confidence  )

static

Definition at line 518 of file vf_deshake_opencl.c.

optimize_model()

static void optimize_model ( DeshakeOpenCLContext *  deshake_ctx, MotionVector *  best_pairs, MotionVector *  inliers, const int  num_inliers, float  best_err, double *  model_out  )

static

Definition at line 601 of file vf_deshake_opencl.c.

Referenced by minimize_error().

minimize_error()

static int minimize_error ( DeshakeOpenCLContext *  deshake_ctx, MotionVector *  inliers, DebugMatches *  debug_matches, const int  num_inliers, double *  model_out, const int  max_iters  )

static

Definition at line 674 of file vf_deshake_opencl.c.

decompose_transform()

static FrameDelta decompose_transform ( double *  model )

static

Definition at line 738 of file vf_deshake_opencl.c.

make_vectors_contig()

static int make_vectors_contig ( DeshakeOpenCLContext *  deshake_ctx, int  size_y, int  size_x  )

static

Definition at line 778 of file vf_deshake_opencl.c.

gaussian_for()

static float gaussian_for ( int  x, float  sigma  )

static

Definition at line 804 of file vf_deshake_opencl.c.

Referenced by make_gauss_kernel().

make_gauss_kernel()

static void make_gauss_kernel ( float *  gauss_kernel, float  length, float  sigma  )

static

Definition at line 810 of file vf_deshake_opencl.c.

Referenced by smooth().

start_end_for()

static IterIndices start_end_for ( DeshakeOpenCLContext *  deshake_ctx, int  length  )

static

Definition at line 834 of file vf_deshake_opencl.c.

Referenced by smooth().

ringbuf_float_at()

static void ringbuf_float_at ( DeshakeOpenCLContext *  deshake_ctx, AVFifo *  values, float *  val, int  offset  )

static

Definition at line 845 of file vf_deshake_opencl.c.

Referenced by smooth().

smooth()

static float smooth ( DeshakeOpenCLContext *  deshake_ctx, float *  gauss_kernel, int  length, float  max_val, AVFifo *  values  )

static

Definition at line 888 of file vf_deshake_opencl.c.

Referenced by decode_lspf(), do_transform(), filter_channel(), filter_frame(), smooth_end_frame_filter(), and smooth_init().

transformed_point()

static cl_float2 transformed_point ( float  x, float  y, float *  transform  )

static

Definition at line 942 of file vf_deshake_opencl.c.

Referenced by transform_center_scale(), and update_needed_crop().

transform_center_scale()

static void transform_center_scale ( float  x_shift, float  y_shift, float  angle, float  scale_x, float  scale_y, float  center_w, float  center_h, float *  matrix  )

static

Definition at line 952 of file vf_deshake_opencl.c.

Referenced by filter_frame().

update_needed_crop()

static void update_needed_crop ( CropInfo *  crop, float *  transform, float  frame_width, float  frame_height  )

static

Definition at line 990 of file vf_deshake_opencl.c.

Referenced by filter_frame().

deshake_opencl_uninit()

static av_cold void deshake_opencl_uninit ( AVFilterContext *  avctx )

static

Definition at line 1051 of file vf_deshake_opencl.c.

deshake_opencl_init()

static int deshake_opencl_init ( AVFilterContext *  avctx )

static

Definition at line 1110 of file vf_deshake_opencl.c.

Referenced by activate().

transform_debug()

static void transform_debug ( AVFilterContext *  avctx, float *  new_vals, float *  old_vals, int  curr_frame  )

static

Definition at line 1340 of file vf_deshake_opencl.c.

Referenced by filter_frame().

filter_frame()

static int filter_frame ( AVFilterLink *  link, AVFrame *  input_frame  )

static

Definition at line 1368 of file vf_deshake_opencl.c.

Referenced by activate().

queue_frame()

static int queue_frame ( AVFilterLink *  link, AVFrame *  input_frame  )

static

Definition at line 1732 of file vf_deshake_opencl.c.

Referenced by activate().

activate()

static int activate ( AVFilterContext *  ctx )

static

Definition at line 2011 of file vf_deshake_opencl.c.

AVFILTER_DEFINE_CLASS()

AVFILTER_DEFINE_CLASS

(

deshake_opencl

)

Variable Documentation

deshake_opencl_inputs

const AVFilterPad deshake_opencl_inputs[]

static

Initial value:

= {
    {
        .name = "default",
        .type = AVMEDIA_TYPE_VIDEO,
        .config_props = &ff_opencl_filter_config_input,
    },
}

Definition at line 2110 of file vf_deshake_opencl.c.

deshake_opencl_outputs

const AVFilterPad deshake_opencl_outputs[]

static

Initial value:

= {
    {
        .name = "default",
        .type = AVMEDIA_TYPE_VIDEO,
        .config_props = &ff_opencl_filter_config_output,
    },
}

Definition at line 2118 of file vf_deshake_opencl.c.

deshake_opencl_options

const AVOption deshake_opencl_options[]

static

Initial value:

= {
    {
        "tripod", "simulates a tripod by preventing any camera movement whatsoever "
        "from the original frame",
        OFFSET(tripod_mode), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, FLAGS
    },
    {
        "debug", "turn on additional debugging information",
        OFFSET(debug_on), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, FLAGS
    },
    {
        "adaptive_crop", "attempt to subtly crop borders to reduce mirrored content",
        OFFSET(should_crop), AV_OPT_TYPE_BOOL, {.i64 = 1}, 0, 1, FLAGS
    },
    {
        "refine_features", "refine feature point locations at a sub-pixel level",
        OFFSET(refine_features), AV_OPT_TYPE_BOOL, {.i64 = 1}, 0, 1, FLAGS
    },
    {
        "smooth_strength", "smoothing strength (0 attempts to adaptively determine optimal strength)",
        OFFSET(smooth_percent), AV_OPT_TYPE_FLOAT, {.dbl = 0.0f}, 0.0f, 1.0f, FLAGS
    },
    {
        "smooth_window_multiplier", "multiplier for number of frames to buffer for motion data",
        OFFSET(smooth_window_multiplier), AV_OPT_TYPE_FLOAT, {.dbl = 2.0}, 0.1, 10.0, FLAGS
    },
    { NULL }
}

Definition at line 2129 of file vf_deshake_opencl.c.

ff_vf_deshake_opencl

const AVFilter ff_vf_deshake_opencl

Initial value:

= {
    .name           = "deshake_opencl",
    .description    = NULL_IF_CONFIG_SMALL("Feature-point based video stabilization filter"),
    .priv_size      = sizeof(DeshakeOpenCLContext),
    .priv_class     = &deshake_opencl_class,
    .init           = &ff_opencl_filter_init,
    .uninit         = &deshake_opencl_uninit,
    .activate       = activate,
    FILTER_INPUTS(deshake_opencl_inputs),
    FILTER_OUTPUTS(deshake_opencl_outputs),
    FILTER_SINGLE_PIXFMT(AV_PIX_FMT_OPENCL),
    .flags_internal = FF_FILTER_FLAG_HWFRAME_AWARE,
    .flags          = AVFILTER_FLAG_HWDEVICE,
}

Definition at line 2160 of file vf_deshake_opencl.c.